Emir Karabeg

Emir Karabeg

Y Combinator Logo Batch: X25

Achievements

  • Co-founder and CEO of Sim Studio, an open-source AI agent builder used by the Department of Defense
  • Participated in Y Combinator's Spring 2025 batch with Sim Studio
  • Founded WorkNinja, an AI learning platform that scaled to over 300K monthly active users
  • Studied Data Science and Cognitive Science at UC Berkeley, with research in NLP and machine translation
  • Pushed the chain-of-thought reasoning wave early in AI development
  • Active in open-source, contributing to the simstudioai/sim repository

Can we talk about Emir Karabeg

Yo, have you heard of Emir Karabeg? This guy’s the real deal in AI and startups. He’s the CEO and co-founder of Sim Studio, which is basically changing how people build AI agents. The crazy part? Sim Studio is open-source, super user-friendly, and used by legit big players like the Department of Defense. They crushed it in YC’s Spring 2025 batch, which is a huge deal in the startup world.

Emir’s story is all about jumping into the deep end and making shit happen. Before Sim Studio, he studied Data Science and Cognitive Science at UC Berkeley-yeah, the top school-and he was deep into NLP and machine translation research. That’s where he got his tech chops, understanding how language and AI can talk to each other. But he didn’t stop there. He started WorkNinja, an AI learning platform that grew super fast to 300K+ monthly active users. This guy was early on the chain-of-thought reasoning wave-basically teaching AI how to think step-by-step, which is huge for making AI smarter.

What’s cool is, Emir isn’t just building tech for the sake of it. He’s about making AI accessible. That’s why Sim Studio is such a big change. It bridges the gap between raw, complicated agent frameworks and no-code tools that even a non-tech person can mess with. It’s like giving everyone the keys to build AI agents without needing a PhD. That’s why big organizations and even the military are using it-because it’s production-grade and customizable.

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He’s based in SF, super active in open-source, and always pushing the boundaries. His process shows he’s driven by a desire to make AI more accessible and useful, not just some fancy tech for the elite. Starting something like Sim Studio isn’t easy-takes a crazy amount of vision, hustle, and guts. Emir’s been doing exactly that, and now he’s on the radar of investors and big institutions.

Bottom line? Emir Karabeg is one of those founders you gotta watch. He’s got the tech skills, the vision, and the grit to really shake up AI. And he’s just getting started.

Founder ID: 100676

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